遥感技术在江浪矿田找矿预测中的应用
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摘要
本论文对研究区地质、矿田构造进行研究,结合遥感技术完成构造解译和矿化信息提取,并进行综合分析提出找矿远景区。
江浪穹窿主要经历了早期韧性挤压-剪切变形、后期脆韧性重力滑脱变形,两个期次的变形均对铜矿的成矿作用起贡献作用,早期韧性变形阶段使得铜矿进行了一定的富集,形成品位较低的浸染状、条带状矿体;后期脆韧性变形阶段是铜矿的最重要的成矿期,形成似层状的致密块状高品位铜矿体。
通过对江浪穹窿的遥感影像进行解译,对矿区线性构造、环形构造、地层带块进行了遥感信息提取,本次解译获取研究区线性构造及断层共计260条。经分析,区内主要发育北东向线性构造,并逐渐从东西向往北西向过度。高值区主要成北东向带状展布。高密度区域主要集中在江浪穹窿构造的核部区域;区内共解译环形构造18处,解译的环形构造主要集中在研究区的东部、西北部、中部以及南部区域,同时这些区域也是线性构造发育区域,并与已知矿床有着良好的空间相关性。
通过运用主分量分析法与门限化异常分析法,将矿区的遥感蚀变异常分割为羟基、铁染一级、二级、三级异常分级。羟基和铁染蚀变信息主要集中在研究区的东部地区,西部地区比较少见。尤其在研究区的东南向区域,两者均有较强的表现,该区域也是里伍铜矿的所在地,可见蚀变与矿床之间存在着某种联系,可以作为进一步找矿的线索加以利用。在研究区的西北及西南部区域,区域的环形闭合构造现象较为明显,同时伴随着多期的线性构造单元,形成了比较鲜明的构造地质现象,同样该区域中也存在着目前已探明的铜矿,可见构造线及环形解译与矿床成因之间也存在着联系。
依据线性构造解译,环形构造解译以及地层遥感信息的解译,集合羟基、铁染异常分级,本次研究获取的遥感解译信息,结合地质信息进行综合分析,预测二道棚子、茯苓山、竹林湾-小堡子、藏族堡子-海底沟、磨坊沟-江浪沟、师戈区共6个区域为找矿远景区,为下一阶段找矿工作的开展做了有益的尝试。本次研究对指导里伍铜矿区域及外围找矿具有探索意义,对外围长枪,踏卡、恰斯穹窿远景区等核杂岩体具有良好启示。
The thesis of the study area geology, ore-field structure, combination of remote sensing technology to complete mineralized structure interpretation and information extraction, and propose a comprehensive analysis of prospect area.
Jianglang dome tectonic gone through the early ductile compressive - shear deformation, gravity slip ductile deformation of late, the two were on the deformation of sub-copper mineralization from the contribution of the role of copper makes the early stages of ductile deformation, which must be enrichment, the formation of low grade disseminated, banded ore; the late stage of ductile deformation is the most important copper mineralization, the formation of the dense layer may block high-grade copper ore body.
Based on the Jianglang dome tectonic of remote sensing images interpretation, linear structure of the mining area, circular structure, with block formation of remote sensing information extraction, interpretation of this linear structure for the study area and a total of 260 faults. After analysis, the main development region trending linear structure, and gradually from east to west over north longing. High value area into the North East to the banded distribution. High-density areas are mainly concentrated in the dome structure of the nuclear wave Jiang, Regional; area of interpretation of ring structures 18, interpretation of ring structures concentrated in the eastern part of the study area, northwestern, central and southern regions, while these areas are linear structure and development area, and with the known deposits have a good spatial correlation.
Through utilizes the main component analytic method and the threshold unusual analytic method, exceptionally divides the mining area remote sensing alteration for the hydroxyl, the iron dyes first-level, second-level, third-level exceptionally grades. The hydroxyl and the iron dye the alteration information mainly to concentrate in the research area eastern area, the western area are quite rare. Especially in the research area's southeast to the region, both has the strong performance, this region is also in the five copper mine locus, obviously between the alteration and the ore deposit has some kind of relation, may take the clue which further prospects to use. In the research area northwest and the north-west region, the region ring-like closure phenomenon is more obvious, simultaneously is following many issue of linearity tectonic element, has formed the quite bright geotectonic phenomenon, similarly in this region also has present already the copper mine which verifies, obviously between the lineation and the ring-like interpretation and the ore deposit origin also have the relation.
Based on the linear structure interpretation, the ring structure interpretation as well as the stratum remote sensing information's interpretation, gathers the hydroxyl, the iron to dye exceptionally grades, this research gain's remote sensing interpretation information, the union geology information carries on the generalized analysis, forecast that two sheds, the Poris cocos mountain, the bamboo grove bay - small villages, the Tibetan national minority village - submarine trench, mill ditch - Jiang Langgou, Shi Gequ the altogether 6 regions for the prospecting prospect area, has made the beneficial attempt for the next stage prospecting work's development. In this research to instructs the five copper mine region and the periphery prospecting has the exploration significance, to the periphery long-barrelled gun, treads the card, nucleus mixed rock masses and so on Si dome prospect area to have the good enlightenment exactly.
江浪穹窿主要经历了早期韧性挤压-剪切变形、后期脆韧性重力滑脱变形,两个期次的变形均对铜矿的成矿作用起贡献作用,早期韧性变形阶段使得铜矿进行了一定的富集,形成品位较低的浸染状、条带状矿体;后期脆韧性变形阶段是铜矿的最重要的成矿期,形成似层状的致密块状高品位铜矿体。
通过对江浪穹窿的遥感影像进行解译,对矿区线性构造、环形构造、地层带块进行了遥感信息提取,本次解译获取研究区线性构造及断层共计260条。经分析,区内主要发育北东向线性构造,并逐渐从东西向往北西向过度。高值区主要成北东向带状展布。高密度区域主要集中在江浪穹窿构造的核部区域;区内共解译环形构造18处,解译的环形构造主要集中在研究区的东部、西北部、中部以及南部区域,同时这些区域也是线性构造发育区域,并与已知矿床有着良好的空间相关性。
通过运用主分量分析法与门限化异常分析法,将矿区的遥感蚀变异常分割为羟基、铁染一级、二级、三级异常分级。羟基和铁染蚀变信息主要集中在研究区的东部地区,西部地区比较少见。尤其在研究区的东南向区域,两者均有较强的表现,该区域也是里伍铜矿的所在地,可见蚀变与矿床之间存在着某种联系,可以作为进一步找矿的线索加以利用。在研究区的西北及西南部区域,区域的环形闭合构造现象较为明显,同时伴随着多期的线性构造单元,形成了比较鲜明的构造地质现象,同样该区域中也存在着目前已探明的铜矿,可见构造线及环形解译与矿床成因之间也存在着联系。
依据线性构造解译,环形构造解译以及地层遥感信息的解译,集合羟基、铁染异常分级,本次研究获取的遥感解译信息,结合地质信息进行综合分析,预测二道棚子、茯苓山、竹林湾-小堡子、藏族堡子-海底沟、磨坊沟-江浪沟、师戈区共6个区域为找矿远景区,为下一阶段找矿工作的开展做了有益的尝试。本次研究对指导里伍铜矿区域及外围找矿具有探索意义,对外围长枪,踏卡、恰斯穹窿远景区等核杂岩体具有良好启示。
The thesis of the study area geology, ore-field structure, combination of remote sensing technology to complete mineralized structure interpretation and information extraction, and propose a comprehensive analysis of prospect area.
Jianglang dome tectonic gone through the early ductile compressive - shear deformation, gravity slip ductile deformation of late, the two were on the deformation of sub-copper mineralization from the contribution of the role of copper makes the early stages of ductile deformation, which must be enrichment, the formation of low grade disseminated, banded ore; the late stage of ductile deformation is the most important copper mineralization, the formation of the dense layer may block high-grade copper ore body.
Based on the Jianglang dome tectonic of remote sensing images interpretation, linear structure of the mining area, circular structure, with block formation of remote sensing information extraction, interpretation of this linear structure for the study area and a total of 260 faults. After analysis, the main development region trending linear structure, and gradually from east to west over north longing. High value area into the North East to the banded distribution. High-density areas are mainly concentrated in the dome structure of the nuclear wave Jiang, Regional; area of interpretation of ring structures 18, interpretation of ring structures concentrated in the eastern part of the study area, northwestern, central and southern regions, while these areas are linear structure and development area, and with the known deposits have a good spatial correlation.
Through utilizes the main component analytic method and the threshold unusual analytic method, exceptionally divides the mining area remote sensing alteration for the hydroxyl, the iron dyes first-level, second-level, third-level exceptionally grades. The hydroxyl and the iron dye the alteration information mainly to concentrate in the research area eastern area, the western area are quite rare. Especially in the research area's southeast to the region, both has the strong performance, this region is also in the five copper mine locus, obviously between the alteration and the ore deposit has some kind of relation, may take the clue which further prospects to use. In the research area northwest and the north-west region, the region ring-like closure phenomenon is more obvious, simultaneously is following many issue of linearity tectonic element, has formed the quite bright geotectonic phenomenon, similarly in this region also has present already the copper mine which verifies, obviously between the lineation and the ring-like interpretation and the ore deposit origin also have the relation.
Based on the linear structure interpretation, the ring structure interpretation as well as the stratum remote sensing information's interpretation, gathers the hydroxyl, the iron to dye exceptionally grades, this research gain's remote sensing interpretation information, the union geology information carries on the generalized analysis, forecast that two sheds, the Poris cocos mountain, the bamboo grove bay - small villages, the Tibetan national minority village - submarine trench, mill ditch - Jiang Langgou, Shi Gequ the altogether 6 regions for the prospecting prospect area, has made the beneficial attempt for the next stage prospecting work's development. In this research to instructs the five copper mine region and the periphery prospecting has the exploration significance, to the periphery long-barrelled gun, treads the card, nucleus mixed rock masses and so on Si dome prospect area to have the good enlightenment exactly.
引文
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[2] Cloutis E A. Hyperspectral geological remote sensing evaluation of analytical techniques[J].Int J R remote Sensing,1996,17(12):221~224.
[3] D.Rokos etc. Structural Analysis for Gold mineralization Using Remote Sensing and Geochemical Techniques in a GIS Environment:Island of Lesvos, Hellas. Natural Resources Research,2000,9(4).
[4] Pieters CM, Mustard J F. Exploration of Crustal/Mantlematerial for the Earth and Moon using reflectance spectroscopy [J].Remote sensing of Environment, 1988, 24:151~178.
[5] G.R.Hunt and J.W.Salisloury, Visibal & Near-infrared Spectra of Rocks and Minerals[J], Modern Geology,1974,5(1):212~219.
[6] G.R.Hunt.Near-infrared (1.3~2.4μm) Spectra of Alternation Minearls-Potentical for Use in Remote Sensing, Geophysics 1979,44(1):242~248.
[7] Gils P. Remote Sensing and Cast Shadows in Mountainous Terrain [J]. Photogramm etric Engineering and Remote Sensing,2001,67(7):833~839.
[8]刘严松.里伍铜矿遥感找矿信息提取及外围找矿远景分析[D] .成都:成都理工大学,2008.
[9]陈述彭,童庆禧,郭华东.遥感信息机理研究[M].北京:科学出版社,1998
[10]丁暄,童庆禧,郑兰芬,等.光谱遥感找矿理论、技术与应用[J],地球化学,1992(1),1~8.
[11]冯孝良,汪名杰,文成敏,张惠华.浅析里伍铜矿外围找矿前景[J].沉积与特提斯,2007,27(1):9～37.
[12]傅昭仁,宋鸿林,颜丹平,等.扬子地台西缘江浪变质核杂岩结构及对成矿的控制[M].地质学报,1997.71 (2):113～122.
[13]四川省地质局406地质队,里伍矿区铜矿详细勘探地质报告[R],1976.
[14]宋鸿林,田竟亚,颜丹平,等.扬子地台西缘江浪变质核杂岩体变形变质作用及里伍式铜矿成矿模式[R].中国地质大学,四川地质局404队.1995.
[15]孙华山,赵鹏大,张寿庭,夏庆霖.因子分析在成矿多样性定量化研究中的应用—以滇西北富碱斑岩矿产类型成矿多样性分析为例[J].成都理工大学学报,2005,32(1):82～86.
[16]王锡华,李伟.红透山矿床变质岩系褶皱构造特征浅析[J].矿床与地质,2004,16(6):245~248.
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